Expected Behavior Violation Affecting grpc-data package, versions <0:1.56.2-10.amzn2023


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.16% (54th percentile)

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  • Snyk IDSNYK-AMZN2023-GRPCDATA-5836692
  • published10 Aug 2023
  • disclosed9 Jun 2023

Introduced: 9 Jun 2023

CVE-2023-32731  (opens in a new tab)
CWE-440  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 grpc-data to version 0:1.56.2-10.amzn2023 or higher.
This issue was patched in ALAS2023-2023-282.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grpc-data package and not the grpc-data package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. This caused any HPACK table mutations to also be skipped, resulting in a desynchronization of HPACK tables between sender and receiver. If leveraged, say, between a proxy and a backend, this could lead to requests from the proxy being interpreted as containing headers from different proxy clients - leading to an information leak that can be used for privilege escalation or data exfiltration. We recommend upgrading beyond the commit contained in  https://github.com/grpc/grpc/pull/33005 https://github.com/grpc/grpc/pull/33005

CVSS Scores

version 3.1